Bernhard heinrich munsch



(No Model.)

B H MENSCH Y GAS COMPRESSOR POB. RBPRIGBRATING MACHINES. No. 482,876..

Patented Sept. v20, 1892.

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BERNHARD HEINRICH MUNsoH, oF HASTEDT, NEAR BREMEN, AssIGNoR To WILHELMosENBRoK AND ADoLE osENBRoK, oF HEMELINGEN,

GERMANY.

GAS-COMPRESSOR FOR REFRlGERATlNG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 482,876, datedSeptember 20, 1892.

Application led May 19. 1892. Serial No. 433,514. (No model.) Patentedin Germany September l, 18911N' 62,318-

.To @ZZ whom t may concern,.-

Be it known that I, BERNHARD HEINRICH MUNSCH, a subject of the King ofPrussia, residing at Hastedt, near Bremen, Empire of Germany, haveinvented new and useful Improvements in Gas-Compressors forRefrigerating-Machines, (for which Letters Patent have been granted tomein Germany, dated September l, 1891, No. 62,318,) of which the followingis a specification.

My invention. has reference to improvements in refrigerating-machines,and especially to devices for returning to the system the gases escapingfrom the cylinder of the compressor.

The novel features of my invention are fully pointed out in thefollowing specification and claims and illustrated in the accompanyingdrawings, in which- Figure 1 represents a longitudinal section, and Fig.2 a sectional end View, of a compressor-cylinder provided with myinvention.

Similar letters indicate corresponding parts throughout both views. z 5In the drawings, the letter C designates the cylinder of the compressor,A the pistonrod, and B the stuffing-box at the end of the cylinder.

E designates the cylinder 0f a small pump inder C.

The piston-rod A of the compressor is extended and carries a smallpiston D, fitted to the bore of the pump-cylinder E.

a and b are valves located at opposite ends of the cylinder' E. The portcontrolled by valve a is connected with the induction-pipe (not shown)of the air-compressor by a pipe d, while the port controlled by valve bis connected by a pipe c with the opposite end of the pump-cylinder,said pipe opening into the cylinder at c.

It is evident that the gas escaping from the cylinder of the compressorat the stuihngarranged in line with and secured to the cylbox Bisreceived by the pump-cylinder E as the piston-rod moves in the directionof the arrow indicated thereon, and on the return stroke it is forcedinto the inductionpipe through pipe d. If leakage occurs about thepiston D, the gas which passes the same is forced through the pipe c tothe opposite side of the piston, and from thence to the induction-pipethrough valve a and pipe d.

What I claim as new, and desire to secure by Letters Patent, is-

1. In a refrigerating-machine, the combination of the compressor, apump-cylinder arranged in line with the compressor-cylinder to receivethe gases escaping about the stufiing-box of the same, a piston formedon an extension of the piston-rod of the compressor, a port opening intothe end of the pump-cylinder toward the compressor-cylinder andconnected with the induction-pipe of the latter, and a valve a,controlling said port, substantially as described.

2. In a refrigerating-machine, the combination of the compressor, apump-cylinder arranged in line with the compressor to receive the gasesescaping about the stuffingbox of the same, a piston formed on an eX-tension of the piston-rod of the compressor, ports located at oppositeends of the pumpcylinder, the one being connected with theinduction-pipe of the compressor and the other with the pump-cylinder atthe opposite end, and valves a b, controlling said ports, substantiallyas and for the purpose specified.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

BERNHARD HEINRICH MUNSCH.

Witnesses:

JOHN H. SOHUABEL, W. G. GERLACH.

